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Finding the Fourth Proportional to 555.28, 829.90 and 511.50

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Solution

The fourth proportional to 555.28, 829.90 and 511.50 is: 764.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    555.28 : 829.90 = 511.50 : x
  2. Step 2: Convert to fraction form
    555.28/829.90 = 511.50/x
  3. Step 3: Cross multiply
    555.28x = 829.90 × 511.50
  4. Step 4: Simplify right side
    555.28x = 424,493.85
  5. Step 5: Solve for x
    x = 424,493.85/555.28
  6. Step 6: Final answer
    x = 764.47

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.